Sod's lawˌSod's ˈlaw noun [uncountable] 
British English the natural tendency for things to go wrong whenever possible – used humorously SYN Murphy’s Law American English: 
It’s Sod’s law that the car breaks down when you need it most.
British English the natural tendency for things to go wrong whenever possible – used humorously SYN Murphy’s Law American English: It’s Sod’s law that the car breaks down when you need it most.